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Why compete?

The CircularCityChallenge is an opportunity to build and learn together, make a difference in your communities, and innovate
for impact! As a pupil or student aged 14-19 years you can accomplish all this and win prizes by sharing your idea!

You already have an idea for your local environment?
Upload it at the submit section at the bottom of this page!

You want more guidance?
Find a logbook and more resources below.

Realise your passion
Passion can drive great ideas and great work, which in turn further fuel your purpose. Use the CircularCityChallenge and connect to other passionate students in order to take your idea to the next level—a chance to showcase your work on a European stage and win great prizes!
Build your skills
As a participant in the competition, you will not only sharpen your leadership, collaboration, and competition skills, but also develop systems thinking skills to be prepared to independently plan and implement a circularity project in your municipality. CCC has the tools, training materials, and support to help you bring your project to life and eventually incorporate it into your career portfolio.
Shape our world
The competition provides you with a great opportunity to develop your ideas that address some of today’s most pressing sustainability challenges, present it to the industry pros and decision makers, and ultimately effect positive change.

What's in it for you as a CCC participant

Membership in our “Circularity Heroes” online community to network with likeminded peers & jointly act for change

Networking opportunities with international jury members & prominent actors in circular economy to get your ideas to the next level

Expert workshops about circular economy & career options in the circular economy with a certificate of participation

All participants will receive feedback from the jury and a certificate of participation


600€ for each winning team!

Winning certificates for your contribution to sustainability
and circularity

Online showcase of the submissions and teams’ interview videos on the CCC platform

Follow the six steps for success

The CCC LOGBOOK guides you through all the steps of the challenge. It will help you develop your circular idea. It will also give you tips and tricks on how to make your idea more effective, impactful and convincing. If you prefer, you can also submit your idea without using the logbook.

Download here and start your journey!

The logbook is also available in Romanian, Spanish and German – Download them HERE!

If you have any questions or need any assistance for the contest, feel free to contact us! We will be happy to support you. You can reach us via the contact form or write directly to antonija.bogadi(at)


Work better and smarter on your challenge with our knowledge hub. Find videos, books, and articles that can help you with each step of this contest. Learn, grow, and improve your skills. Explore our knowledge hub and see what you can achieve!

Circular economy in a nutshell


Find a circular challenge in your city and organise your team


Observe and map the stakeholders around your challenge


Find a better way! Rewrite the rules!


Design your idea


Tell us your story & submit!


    By uploading your project ideas to Synyo, you agree to the following terms:

    Ownership: You retain ownership of your project idea. However, by submitting, you grant Synyo a non-exclusive, royalty-free license to display, distribute, and promote your project on our website and related channels.

    Use of Content: Synyo reserves the right to use any uploaded project ideas for marketing, promotional, and display purposes on our website and other platforms where Synyo is represented.

    No Confidentiality: Please be aware that any project idea uploaded to Synyo will be considered non-confidential and non-proprietary. As such, we recommend not sharing any sensitive or proprietary information that you wish to keep confidential.

    Community Sharing: Synyo is a community-driven platform. Your project ideas may be viewed, shared, and commented on by other users. We encourage a collaborative environment and the exchange of ideas within the community.

    Attribution:Synyo will provide proper attribution to the creators of the project ideas whenever displayed or referenced.

    Modification of Terms:Synyo reserves the right to modify these terms at any time without prior notice. Continued use of the platform after any such changes constitutes your consent to such changes.

    By proceeding with the upload of your project idea, you acknowledge that you have read, understood, and agree to these terms.